AU2652301A - Method for reprocessing dust or dust mixtures - Google Patents
Method for reprocessing dust or dust mixtures Download PDFInfo
- Publication number
- AU2652301A AU2652301A AU26523/01A AU2652301A AU2652301A AU 2652301 A AU2652301 A AU 2652301A AU 26523/01 A AU26523/01 A AU 26523/01A AU 2652301 A AU2652301 A AU 2652301A AU 2652301 A AU2652301 A AU 2652301A
- Authority
- AU
- Australia
- Prior art keywords
- dusts
- dust
- blown
- slags
- bath
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000428 dust Substances 0.000 title claims description 34
- 238000000034 method Methods 0.000 title claims description 22
- 239000000203 mixture Substances 0.000 title claims description 18
- 238000012958 reprocessing Methods 0.000 title 1
- 239000002893 slag Substances 0.000 claims description 33
- 229910001385 heavy metal Inorganic materials 0.000 claims description 11
- 239000000654 additive Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910000805 Pig iron Inorganic materials 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 229910001570 bauxite Inorganic materials 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 239000007792 gaseous phase Substances 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- -1 e.g. Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 150000002736 metal compounds Chemical class 0.000 claims description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 14
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 8
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 7
- 239000011787 zinc oxide Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 229910052681 coesite Inorganic materials 0.000 description 4
- 229910052906 cristobalite Inorganic materials 0.000 description 4
- 235000013980 iron oxide Nutrition 0.000 description 4
- 229910052682 stishovite Inorganic materials 0.000 description 4
- 229910052905 tridymite Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 3
- 229910000464 lead oxide Inorganic materials 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B13/00—Obtaining lead
- C22B13/02—Obtaining lead by dry processes
- C22B13/025—Recovery from waste materials
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
Method for Processing Dusts or Dust Mixtures The invention relates to a method for processing dusts or dust mixtures containing alkalis and heavy metals, such as, e.g., 5 steelworks dusts, fine ores or blast furnace dusts, dusts from sintering plants, rolling mills, waste incineration plants as well as residual substances and ashes from combustion plants and shredder works. 10 In the course of blast furnace and steelworks processes, high amounts of dusts occur, as a rule, the processing of which involves a number of problems. Depending on the origin of such dusts, the latter, as a rule, contain considerable amounts of heavy metals whose concentrations usually are, however, too 15 low to be directly processed economically. In particular, steelworks filter dust may contain more than 10 wt.-% zinc oxide and lead oxide. In the course of the processing of oxidic slags, a number of 20 methods have already been proposed, by which not only the basicities of the slags are adjusted with a view to enabling their use as grinding additives in the cement industry, but, at the same time, also the purification and depletion of undesired components are effected, part of which, in the 25 metallic form, may be converted into a metal bath, partially reoccuring as secondary dusts or being recoverable from the gaseous phase. In methods of this type in which oxidic slags are to be optimized in terms of composition with a view to enabling their subsequent use in cement technology, a number 30 of additives and/or correctives are introduced or blown in, whereby it is also feasible by such methods to safely dispose of noxious substances and, in particular, organically loaded substances. 35 The invention aims to ensure the economically efficient processing of dusts or dust mixtures of the initially defined kind and, at the same time, provide the opportunity to treat - 2 slags in a manner as to facilitate their further utilization in cement technology. To solve this object, the method according to the invention essentially consists in that the dusts are charged onto or into, in particular top-blown on or 5 blown into, a bath of molten metals and liquid oxidic slags and that volatile heavy metal compounds such as, e.g., Zn or Pb oxides are separated from the gaseous phase and alkalis are introduced into the slags. By charging such dusts or filter dusts onto or into a bath of molten metals and, above all, of 10 molten pig iron and liquid oxidic slags, it is feasible to effect a phase separation at an extremely high selectivity, whereby, in particular, the alkalis contained in the original dusts to the major portion will remain within the slag and heavy metals such as zinc and lead will again be found in the 15 secondary dust in a substantially more concentrated form, the overall dust amount introduced, at the same time, being reducible substantially and, in particular, to far below half of the original amount. In addition to the essential effect of reducing the amount of dust, it is, thus, feasible within the 20 context of the method according to the invention to form secondary dusts whose economic further use is substantially facilitated on account of the higher concentrations of the individual components whose recovery appears suitable, the simultaneous enrichment of the oxidic slags with alkalis 25 imparting on the product enhanced properties in regard to a possible cement-technological further use. In the context of the method according to the invention, it is advantageously proceeded in a manner that the basicities of 30 the liquid slags are adjusted to values of, for instance, between 1 and 1.4 prior dust charging. Liquid oxidic slags exhibiting such basicities and floating on a pig iron bath stand out for their particularly high selectivity in the desired separation of alkalis at a simultaneously low tendency 35 to taking up heavy metals. At the same time, it is feasible within the context of such a method, to reduce the iron oxide content of the dusts or filter dusts used, so that the
-
3 recovery of molten iron from such dusts is feasible as a side effect, thus further enhancing the economy of the method. In addition to the substantial reduction of the overall dust amount, it is, thus, feasible to recover iron from iron oxides 5 and, at the same time, enrich heavy metals in the secondary dust, thus providing particularly beneficial conditions for the economically efficient recovery of the individual components contained in the secondary dusts. 10 In a particularly advantageous manner, the introduction of the dusts is effected by means of pneumatic conveyance, it being advantageously proceeded such that the dusts are pneumatically conveyed onto or to below the metal or slag surface and blown in or top-blown by the aid of conveying gases, in particular 15 hot blast. Such a pneumatic conveyance allows for the realization of a homogenous blending with additives simultaneously with the introduction of the dusts, which additives will subsequently 20 facilitate the pneumatic conveyance, on the one hand, and, at the same time, enable the simultaneous introduction of desired components into the oxidic slags, on the other hand. In a particularly advantageous manner it may be proceeded, in particuar, such that the dusts to be processed are mixed with 25 additives such as, e.g., coal, sand and/or bauxite, whereby, for instance with the use of coal, in addition to ensuring an improved pneumatic conveyability, also the appropriate reduction potential for the continuous separation of metallic iron from iron oxides contained in the dusts is provided, at 30 the same time. The addition of sand and bauxite likewise allows for an enhancement of the pneumatic conveyability, whereby such additives, at the same time, may serve to correct the desired target basicities of the oxidic slags and to adjust an optionally desired higher aluminum content of the 35 slag.
- 4 Within the context of the method according to the invention, it is, however, also feasible, at the same time, to safely treat a number of other problem substances such as, in particular, organically loaded substances and, in particular, 5 slurries and sludges, such additives likewise being suitable to enhance the pneumatic conveyance of the dusts by preventing the formation of agglomerates. When charging such dusts mixed with organically loaded substances, it is feasible to completely burn the organic portions, whereby additional 10 reduction potential can be made available for the reduction of iron oxides from the dusts, at the same time. Advantageously, a pig iron bath is provided as the metal bath within the context of the method according to the invention, 15 the bath in a particularly advantageous manner containing liquid slags and molten pig iron at weight ratios of 1:3 to 1:6, preferably 1:4. In a particularly simple manner, the introduction of the dusts 20 or dust mixtures is effected in that the latter are blown into the converter through bottom tuyeres. After the reaction, which takes place, in particular, on the interphase between slag and metal bath, secondary dust occurs in an amount which is much lower than a third of the original amount, even lies 25 below 10 % of the original amount. In the following, the invention will be explained in more detail by way of an exemplary embodiment. In a converter, 2 tons of a slag having the composition indicated below were 30 produced on a bath comprised of 10 tons of molten pig iron: -5 Slag mass-% CaO 47 .9 SiO2 36.6 Al2O3 7.3 MgO 2.9 TiO2 1.2 FeO 1.6 MnO 2.1 Na20 0.1 K20 0.2 ZnO 0 PbO 0 This slag is characterized by a basicity that is beneficial to its subsequent utilization in cement technology and, as a 5 rule, contains only low portions of alkalis. For certain cement properties and, in particular, the strength properties such as, for instance, the early strength, of mortar or concrete mixtures produced with such slags as grinding additives, a higher alkali content would be desirable, anyway. 10 1 ton of steelworks filter dust having the composition -indicated below was blown into such a bath through bottom tuyeres: Filter dust wt.-% CaO 7.1 Si02 5.0 A1203 1.3 MgO 2.9 TiO2 0.4 FeO 64.0 MnO 4.2 Na20 2.8 K20 0.1 ZnO 11.5 PbO 0.7 The steelworks filter dust, thus, contained considerable amounts of alkalis and heavy metals. By the penetration of the 5 bath, a phase separation occurred, whereby the alkalis contained in the original dust were bound in the slag at a high selectivity and the heavy metals zinc and lead could be found again in the secondary dust as the respective oxides in concentrated forms. After the treatment of the steelworks 10 filter dusts, a slag composition having the following directional analysis had adjusted: -7 Final slag composition wt.-% CaO 46.9 SiO2 35.4 A1203 7.3 MgO 3.9 TiO2 1.2 FeO 1.7 MnO 2.0 Na20 1.2 K20 0.4 ZnO 5 ppm PbO <5 ppm Secondary dust having the composition below was obtained in an amount of approximately 264 kg: 5 Secondary filter dust composition
----
wt.-% CaO 4.2 SiO2 3.1 Al203 1.2 MgO 1 -. 1 TiO2 0.2 FeO 47.8 MnO 0.4 Na20 0.2 K20 0.4 ZnO 39.8 PbO 2.6 A comparison of the composition of the used steelworks filter dust with the composition of the secondary filter dust, and a comparison of the slag compositions, reveal that K 2 0 was to be - 8 found again in the secondary filter dust by about 3.2 %, whereas 96.8 wt.-% of the K 2 0 content of the dust used were to be found in the product slag. Similar applies to the distribution of the original Na 2 0 content, 4.5 wt.-% of the 5 original portion having been found in the secondary filter dust and 95.5 wt.-% having been found in the product slag. Things are different with the zinc oxide and lead oxide values which were found to be 99.7 and 99.9 wt.%, respectively, in 10 the secondary filter dust. Due to the overall reduction of the amount of secondary filter dust, based on the amount of steelworks dust used, the secondary filter dust then contained portions of these heavy metals, which let economic processing appear suitable. Only about 0.3 and 0.1 wt.-%, respectively, 15 of the zinc oxide and lead oxide portions contained in the steelworks dust used could be determined in the product slag.
Claims (8)
1. A method for processing dusts or dust mixtures containing alkalis and heavy metals, such as, e.g., steelworks dusts, 5 fine ores or blast furnace dusts, characterized in that the dusts are charged onto or into, in particular top-blown on or blown into, a bath of molten metals and liquid oxidic slags and that volatile heavy metal compounds such as, e.g., Zn and/or Pb oxides are separated from the gaseous phase and 10 alkalis are introduced into the slags.
2. A method according to claim 1, characterized in that the basicities of the liquid slags are adjusted to values of between 1 and 1.4 prior to dust charging. 15
3. A method according to claim 1 or 2, characterized in that the dusts are pneumatically conveyed onto or to below the slag surface and blown in or top-blown by the aid of conveying gases, in particular hot blast. 20
4. A method according to claim 1, 2 or 3, characterized in that the dusts to be processed are mixed with additives such as, e.g., coal, sand and/or bauxite. 25
5. A method according to any one of claims 1 to 4, characterized in that the dusts are used mixed with organically loaded substances.
6. A method according to any one of claims 1 to 5, 30 characterized in that a pig iron bath is provided as the metal bath.
7. A method according to any one of claims 1 to 6, characterized in that the bath contains liquid slags and 35 molten pig iron at weight ratios of 1:3 to 1:6, preferably 1:4. - 10
8. A method according to any one of claims 1 to 7, characterized in that the dusts or dust mixtures are blown into the converter through bottom tuyeres.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT642000 | 2000-01-28 | ||
| ATGM64/2000 | 2000-01-28 | ||
| PCT/AT2001/000011 WO2001055460A1 (en) | 2000-01-28 | 2001-01-18 | Method for reprocessing dust or dust mixtures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2652301A true AU2652301A (en) | 2001-08-07 |
| AU771549B2 AU771549B2 (en) | 2004-03-25 |
Family
ID=3480557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU26523/01A Ceased AU771549B2 (en) | 2000-01-28 | 2001-01-18 | Method for reprocessing dust or dust mixtures |
Country Status (22)
| Country | Link |
|---|---|
| US (1) | US20040050210A1 (en) |
| EP (1) | EP1252346B1 (en) |
| JP (1) | JP2004500486A (en) |
| KR (1) | KR100610128B1 (en) |
| CN (1) | CN1188532C (en) |
| AR (1) | AR027284A1 (en) |
| AU (1) | AU771549B2 (en) |
| BR (1) | BR0107826B1 (en) |
| CA (1) | CA2398349A1 (en) |
| CZ (1) | CZ298002B6 (en) |
| DE (1) | DE50100522D1 (en) |
| ES (1) | ES2204827T3 (en) |
| HU (1) | HUP0203883A2 (en) |
| MX (1) | MXPA02007082A (en) |
| PL (1) | PL194872B1 (en) |
| PT (1) | PT1252346E (en) |
| RU (1) | RU2239662C2 (en) |
| SK (1) | SK286015B6 (en) |
| TW (1) | TW533244B (en) |
| UA (1) | UA73541C2 (en) |
| WO (1) | WO2001055460A1 (en) |
| ZA (1) | ZA200205169B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT414127B (en) * | 2004-04-27 | 2006-09-15 | Patco Engineering Gmbh | METHOD FOR RECOVERING METALS AND / OR METAL OXIDES FROM STEELWORDS DUST |
| DE102008048232A1 (en) | 2008-09-16 | 2010-04-15 | Sms Siemag Aktiengesellschaft | Process for the return of dusts and / or solid dusty by-products arising from metallurgical processes |
| CN103031391A (en) * | 2012-05-31 | 2013-04-10 | 新疆八一钢铁股份有限公司 | Process of treating powder waste of steelmaking auxiliary material system |
| JP5906989B2 (en) * | 2012-08-06 | 2016-04-20 | 新日鐵住金株式会社 | Processing method for lead-containing ladle slag |
| JP6025602B2 (en) * | 2013-02-20 | 2016-11-16 | 株式会社神戸製鋼所 | Manufacturing method of slag for roadbed materials |
| KR101419258B1 (en) * | 2013-07-03 | 2014-07-15 | 주식회사 포스코 | Method for operating blast furnace using sintering desulfuration dust |
| CN103896324B (en) * | 2014-03-19 | 2015-11-25 | 江苏科技大学 | A kind of method utilizing blast furnace dust to prepare nano zine oxide |
| RU2582423C1 (en) * | 2014-12-10 | 2016-04-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Белгородский государственный технологический университет им. В.Г. Шухова" | Method of processing of dusty wastes from metallurgical production |
| CN108642231B (en) * | 2018-05-15 | 2020-06-23 | 鞍钢股份有限公司 | Converter slag modifier and method for preparing low-alkalinity slag system by using same |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3015554A (en) * | 1957-04-18 | 1962-01-02 | Rummel Roman | Method and device for carrying out metallurgical processes, particularly air refining processes |
| US3948644A (en) * | 1972-03-27 | 1976-04-06 | Pennsylvania Engineering Corporation | Steel making vessel with dust recycling method and means |
| US4511396A (en) * | 1982-09-01 | 1985-04-16 | Nixon Ivor G | Refining of metals |
| NO160931C (en) * | 1987-04-02 | 1989-06-14 | Elkem As | STOEVBEHANDLING. |
| GB8928997D0 (en) * | 1989-12-22 | 1990-02-28 | Tetronics Res & Dev Co Ltd | Metal recovery |
| DE4211164C2 (en) * | 1992-03-31 | 1995-02-16 | Mannesmann Ag | Method and device for treating pourable or flowable material |
| AT402939B (en) * | 1992-07-16 | 1997-09-25 | Voest Alpine Ind Anlagen | METHOD AND SYSTEM FOR PRODUCING A METAL MELT |
| AT400245B (en) * | 1993-12-10 | 1995-11-27 | Voest Alpine Ind Anlagen | METHOD AND SYSTEM FOR PRODUCING A MELTING IRON |
| AT405527B (en) * | 1996-01-24 | 1999-09-27 | Holderbank Financ Glarus | METHOD FOR REFURBISHING RESIDUES |
| KR100210649B1 (en) * | 1996-04-01 | 1999-07-15 | 야마오카 요지로 | Method for recovering zinc oxide from dust and apparatus therefor |
| AT405054B (en) * | 1997-06-18 | 1999-05-25 | Voest Alpine Ind Anlagen | METHOD AND PLANT FOR PRODUCING AN IRON MEL WITH THE USE OF IRON-CONTAINING RESIDUAL MATERIALS |
| EP0938591B1 (en) * | 1997-09-15 | 2007-11-07 | Holcim Ltd. | Steel slag and ferriferous material reprocessing process useful to produce pig iron and environmentally compatible slags |
| AU9245298A (en) * | 1997-09-30 | 1999-04-23 | Voest-Alpine Stahl Donawitz Gmbh | Pyrometallurgical method and device for separating zinc and/or cadmium from leadin metallurgical residues |
| JP3516854B2 (en) * | 1997-11-20 | 2004-04-05 | スチールプランテック株式会社 | Steelmaking furnace dust treatment method and dust pellets |
| AT407051B (en) * | 1998-09-15 | 2000-12-27 | Holderbank Financ Glarus | METHOD FOR REFURBISHING STEEL SLAGS AND IRON CARRIERS |
| AT407263B (en) * | 1999-04-22 | 2001-02-26 | Holderbank Financ Glarus | METHOD FOR REPRODUCING STEEL SLAG |
| EP1126039B1 (en) * | 2000-02-17 | 2007-02-14 | John A. Vallomy | Method for reductively processing the liquid slag and the baghouse dust of the electric arc furnace |
-
2001
- 2001-01-18 CA CA 2398349 patent/CA2398349A1/en not_active Abandoned
- 2001-01-18 RU RU2002123054A patent/RU2239662C2/en not_active IP Right Cessation
- 2001-01-18 MX MXPA02007082A patent/MXPA02007082A/en active IP Right Grant
- 2001-01-18 ES ES01901011T patent/ES2204827T3/en not_active Expired - Lifetime
- 2001-01-18 KR KR20027009665A patent/KR100610128B1/en not_active IP Right Cessation
- 2001-01-18 CZ CZ20022815A patent/CZ298002B6/en not_active IP Right Cessation
- 2001-01-18 DE DE50100522T patent/DE50100522D1/en not_active Expired - Lifetime
- 2001-01-18 BR BR0107826A patent/BR0107826B1/en not_active IP Right Cessation
- 2001-01-18 JP JP2001554489A patent/JP2004500486A/en active Pending
- 2001-01-18 AU AU26523/01A patent/AU771549B2/en not_active Ceased
- 2001-01-18 TW TW90101180A patent/TW533244B/en not_active IP Right Cessation
- 2001-01-18 HU HU0203883A patent/HUP0203883A2/en unknown
- 2001-01-18 US US10/181,915 patent/US20040050210A1/en not_active Abandoned
- 2001-01-18 UA UA2002075482A patent/UA73541C2/en unknown
- 2001-01-18 WO PCT/AT2001/000011 patent/WO2001055460A1/en active IP Right Grant
- 2001-01-18 SK SK966-2002A patent/SK286015B6/en not_active IP Right Cessation
- 2001-01-18 EP EP01901011A patent/EP1252346B1/en not_active Expired - Lifetime
- 2001-01-18 PL PL356416A patent/PL194872B1/en not_active IP Right Cessation
- 2001-01-18 PT PT01901011T patent/PT1252346E/en unknown
- 2001-01-18 CN CNB018042848A patent/CN1188532C/en not_active Expired - Fee Related
- 2001-01-25 AR ARP010100314 patent/AR027284A1/en not_active Application Discontinuation
-
2002
- 2002-06-26 ZA ZA200205169A patent/ZA200205169B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| UA73541C2 (en) | 2005-08-15 |
| PL356416A1 (en) | 2004-06-28 |
| BR0107826B1 (en) | 2010-09-08 |
| AR027284A1 (en) | 2003-03-19 |
| BR0107826A (en) | 2003-01-14 |
| PT1252346E (en) | 2004-01-30 |
| EP1252346A1 (en) | 2002-10-30 |
| CN1401010A (en) | 2003-03-05 |
| SK9662002A3 (en) | 2003-04-01 |
| JP2004500486A (en) | 2004-01-08 |
| EP1252346B1 (en) | 2003-08-20 |
| SK286015B6 (en) | 2008-01-07 |
| CN1188532C (en) | 2005-02-09 |
| US20040050210A1 (en) | 2004-03-18 |
| ES2204827T3 (en) | 2004-05-01 |
| AU771549B2 (en) | 2004-03-25 |
| DE50100522D1 (en) | 2003-09-25 |
| KR100610128B1 (en) | 2006-08-09 |
| MXPA02007082A (en) | 2004-09-06 |
| ZA200205169B (en) | 2003-10-07 |
| PL194872B1 (en) | 2007-07-31 |
| WO2001055460A1 (en) | 2001-08-02 |
| RU2239662C2 (en) | 2004-11-10 |
| CA2398349A1 (en) | 2001-08-02 |
| CZ298002B6 (en) | 2007-05-23 |
| TW533244B (en) | 2003-05-21 |
| HUP0203883A2 (en) | 2003-04-28 |
| KR20020089330A (en) | 2002-11-29 |
| CZ20022815A3 (en) | 2003-06-18 |
| RU2002123054A (en) | 2004-02-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CB | Opposition filed |
Opponent name: HISMELT CORPORATION PTY LIMITED |
|
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |